Abstract: Systenatic study was carried out on the physiological change of corn under different waterlogging stress at different growth stages.The rerults indicated that waterlogging caused the imbalance of active oxyen metabolism in plant cells,lead to an extensive membrance—lipid and increase of MDA content , the activity of CAT and chlorophyll content dropped . Under waterlogging stress , there appeared to have a close corrdation between the tissue ability to controol lipid peroxxidation and its ability to retain solutes.